The building on the shore
The Old Fort stands on the seafront in the historic quarter of Bagamoyo and is the most solid structure in the town — a square, thick-walled block with a courtyard, visible from the beach and impossible to miss on a walk through the stone town. It is one of the very small number of Bagamoyo buildings that appear on official inventories, and almost nothing about it is settled.
Who names it, and what they say
Tanzania’s tentative World Heritage submission for the Central Slave and Ivory Trade Route, lodged by the Antiquities Department on 20 February 2006, lists the Old Fort among the buildings it cites as important slave-trade evidence at Bagamoyo, alongside the Caravan Serai, the Von Wissmann block, the Old Market and the Customs House. Tanzania Forest Services, promoting the stone town as a heritage destination, also names it — and gives it a construction date of 1897.
Those two statements sit awkwardly together. A building put up in 1897 is a building of the German administration, more than twenty years after the slave trade was officially forbidden in 1873, and it is hard to see how it could be primary evidence for the trade. 1897 is also the year usually attached in circulation to the German administrative building rather than to the fort. The most likely explanation is that the date has migrated between two buildings somewhere in the sources; but no reachable authority resolves it, and this page does not assert a construction date for the fort as a result.
What can be said is that the fort is repeatedly identified, in official and local accounts alike, with the holding of enslaved people before shipment. Whether that identification is sound is part of a larger argument about Bagamoyo that the town guide sets out in full, and that peer-reviewed research published in 2013 answers very differently from the on-site interpretation. The whole question is treated in the guide to slave trade history tours.
Visiting
The fort is a short walk from the rest of the old town and from the beach, and it takes ten or fifteen minutes. There is no substantial interpretation on site. Access and whether any part of the interior is open change with restoration work and are not published anywhere reliable; ask in the town.
If you take a guide, this is the single building at Bagamoyo where the question “how do you know that?” is most worth asking, and the better guides will welcome it. See historical walking tours.
Common questions
How old is it?
Not established here. TFS gives 1897; the tentative-list submission’s use of the building implies something much earlier. No other reachable authority publishes a date.
Is this where slaves were held?
That is the interpretation offered on site and implied by the national submission. It is contested — the research does not support Bagamoyo as a major slave port, and specifically found no record of when a slave market there closed. The fort’s role is part of what is in dispute rather than a settled fact.
Is it the same as the Old Fort in Stone Town?
No. Stone Town has its own Old Fort, a much larger Omani structure on Zanzibar. The two are confused constantly in itineraries.